Method and device for supporting network optimization in next-generation mobile communication system

A method performed by a base station in a wireless communication system, the method comprising:

• receiving, from a terminal, capability information indicating support of a condition-based handover;
• determining to trigger the condition-based handover for the terminal based on the capability information;
• transmitting, to the terminal, configuration information on the condition-based handover;
• and
• receiving, from the terminal, a radio link failure (RLF) report based on the configuration information, in case that a radio resource control (RRC) connection is established with the terminal,
• wherein the RLF report includes first RLF information associated with a failure of a handover to a first cell and second RLF information associated with a failure of a handover to a second cell.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• identify that a condition-based handover is supported by the terminal,
• control the transceiver to receive, from a base station, configuration information on the condition-based handover,
• perform a handover to a first cell, in case that a predetermined condition is identified to be satisfied based on the configuration information,
• perform a cell selection operation, in case that the handover to the first cell is failed,
• perform the handover to a second cell, in case that the second cell is selected based on the cell selection operation, and
• control the transceiver to transmit, to the base station, a radio link failure (RLF) report based on a radio resource control (RRC) connection establishment with the base station, in case that the handover to the second cell is failed,
• wherein the RLF report includes first RLF information associated with a failure of the handover to the first cell and second RLF information associated with a failure of the handover to the second cell.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• control the transceiver to receive, from a terminal, capability information indicating support of a condition-based handover,
• determine to trigger the condition-based handover for the terminal based on the capability information,
• control the transceiver to transmit, to the terminal, configuration information on the condition-based handover, and
• control the transceiver to receive, from the terminal, a radio link failure (RLF) report based on the configuration information, in case that a radio resource control (RRC) connection is established with the terminal,
• wherein the RLF report includes first RLF information associated with a failure of a handover to a first cell and second RLF information associated with a failure of a handover to a second cell.